Have a plan in place with the friend to get his vehicle home if it breaks down on the way. PLease need to know so i can get to work so i dont get fired plz HELP>!!!!! There are two things which can be wrong (that I'm aware of) with the heater core. The heater core is the only component with coolant running through it in the passenger compartment so if you’ve got coolant inside your car, you’ve got a bad heater core. The antifreeze is pumped through the engine — where it absorbs heat — then routed to a radiator at the front of the car. 12-21-2005, 06:50 PM. Try other venting options to be sure. As said earlier, the heater core is … Replacing the heater core is something car owners dread because parts and labor are expensive, and it is a difficult do-it-yourself project. Yes. Even if your radiator can survive with minimal maintenance, the heater core, with narrower passages, will clog up sooner than the radiator and fail sooner than you can expect. Tighten the clamps holding the hoses on and fill with coolant. What condition is the rest of the vehicle in? By continuing to drive with it not working, you are attempting to circulate coolant, putting other cooling system components at risk and eventually damaging the entire cooling system. A hard-part repair is always the best way to fix a bad heater core, but in many cases, the cost can … Put the one you removed from the heater core to the fitting of the one you removed from the engine. I drive a 98 GMC pickup, 350 engine 4x4. If blocked, there's absolutely no issue. and if not is there anyway i can bypass it so i can drive??? Location of a heater core is … It's summer in the northern hemisphere, and you don't NEED a heater. And since you're probably going to ask: Yes, you can drive with a failed heater core, but it's not recommended. 4 Major Signs Of A Bad Heater Core To Know Right Now! Any NAPA or Carquest has a heater-core jumper adapter fitting for under five bucks. ronny muller, yes you can, but remember that you are losing antifreeze somewhere. There is an easy trick you can do in the mean-time. the heater core has been replace two times in last three months, I thought it was bad work but the folks at service seems to think its an electrosis problem.. read more The leak is likely to get worse on the trip plus the overheat concern. Its a 5/8 -3/4 plastic adapter that joins the two heater core hoses at the firewall. Hope this helps, good luck. All you need are two worm-drive stainless steel hose clamps and your done! Signs of a bad heater core are few, but noticeable. Coolant vapor is not good for you. Or you can connect the supply and return hose together bypassing the heater core totally. It can be plugged (not letting coolant through), or it can leak. If the heater core is not the culprit, the cabin air filter might be. So make sure that you check it often and that you do replace the heater core eventually. - … Drive without heat. A car heater core is the part of the engine's cooling system that heats up the interior of the car when the heat is turned on. Find the two lines that run to the heater core. If it leaks, you'll need to run your heater hoses in a loop, to bypass the heater core. Dust and dirt can block airflow but if it’s ok, then the issue is with the heater core. If you feel warm or hot air flowing into the cabin, your heater core has no leaks. A temporary fix would be to pull both heater hoses and connect them to each other, then don't worry about the heater core leaking. Hello all, can anyway please tell me if i can drive my jimmy if the heater core is out. The fan for the heater and defroster blow across this component to bring heat into the vehicle's interior. Don't drive it with a leaking heater core. 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